Energy Efficiency in Random Opportunistic Beamforming

被引：0
|
作者：
Chong, Zhijiat [1 ]
Jorswieck, Eduard A. [1 ]
机构：
[1] Tech Univ Dresden, Inst Nachrichtentech, Lehrstuhl Theoret Nachrichtentech, D-01062 Dresden, Germany
来源：
2011 IEEE 73RD VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) | 2011年
关键词：
MIMO;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
As a step towards decreasing power consumption in mobile communication networks, we investigate the energy efficiency (EE) of a scheduler that can be utilized at the transmitter in a broadcast channel: the random opportunistic beamforming algorithm. Using the ratio of rate to power as the EE metric and considering the constant circuit power, the EE at the transmitter decreases with the number of transmit antennas M. Two approaches of optimizing the power allocation when M - 1 are introduced. We show that the optimal EE scales double-logarithmically with the number of users, which has one antenna each. The appropriate expression for EE in communications is also discussed.
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收藏
页数：5
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